syzbot


kernel BUG in ocfs2_populate_inode

Status: upstream: reported C repro on 2025/03/04 21:06
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+09184149c7c0d9e6f83a@syzkaller.appspotmail.com
First crash: 380d, last: 12d
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2026/02/22 upstream (ToT) 32a92f8c8932 C [report] kernel BUG in ocfs2_populate_inode
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in ocfs2_populate_inode ocfs2 -1 C inconclusive inconclusive 28 6d07h 542d 0/29 upstream: reported C repro on 2024/09/24 05:20
Last patch testing requests (9)
Created Duration User Patch Repo Result
2026/03/08 12:35 10m retest repro linux-5.15.y report log
2026/03/08 12:26 10m retest repro linux-5.15.y report log
2026/02/08 12:24 11m retest repro linux-5.15.y report log
2025/12/30 02:34 14m retest repro linux-5.15.y report log
2025/11/30 08:34 10m retest repro linux-5.15.y report log
2025/10/18 13:48 11m retest repro linux-5.15.y report log
2025/09/21 05:11 11m retest repro linux-5.15.y report log
2025/08/07 18:30 14m retest repro linux-5.15.y report log
2025/07/07 19:49 11m retest repro linux-5.15.y report log
Fix bisection attempts (4)
Created Duration User Patch Repo Result
2026/01/24 02:53 3m fix candidate upstream error job log
2025/07/27 23:29 1m fix candidate upstream error job log
2025/05/25 09:12 59m fix candidate upstream error job log
2025/04/24 06:29 42m bisect fix linux-5.15.y error job log

Sample crash report:
loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
kernel BUG at fs/ocfs2/inode.c:336!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4341 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ocfs2_populate_inode+0x183d/0x1860 fs/ocfs2/inode.c:336
Code: 00 00 e8 56 ad 58 fe 45 84 f6 75 2c e8 ec aa 58 fe 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 28 e9 c7 f1 ff ff e8 d3 aa 58 fe <0f> 0b e8 cc aa 58 fe 0f 0b e9 de fe ff ff e8 c0 aa 58 fe e8 b3 05
RSP: 0018:ffffc900031eee00 EFLAGS: 00010293
RAX: ffffffff8320776d RBX: ffff88805d623338 RCX: ffff888027fcbb80
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000000
RBP: ffffc900031eef50 R08: ffffffff8d89dc2f R09: 1ffffffff1b13b85
R10: dffffc0000000000 R11: fffffbfff1b13b86 R12: dffffc0000000000
R13: ffff88806ad35a2c R14: 0000000000000020 R15: 0000000000000001
FS:  000055558013f500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f434db2a1a9 CR3: 000000005dfb2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_read_locked_inode fs/ocfs2/inode.c:542 [inline]
 ocfs2_iget+0xdbd/0x1a30 fs/ocfs2/inode.c:159
 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:142 [inline]
 ocfs2_get_system_file_inode+0x35b/0x7f0 fs/ocfs2/sysfile.c:112
 ocfs2_init_global_system_inodes+0x2f3/0x6d0 fs/ocfs2/super.c:458
 ocfs2_initialize_super fs/ocfs2/super.c:2279 [inline]
 ocfs2_fill_super+0x4060/0x50f0 fs/ocfs2/super.c:995
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f434da7c8ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffea6cb18b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffea6cb1940 RCX: 00007f434da7c8ca
RDX: 0000200000000000 RSI: 0000200000004480 RDI: 00007ffea6cb1900
RBP: 0000200000000000 R08: 00007ffea6cb1940 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000004480
R13: 00007ffea6cb1900 R14: 0000000000004472 R15: 00002000000009c0
 </TASK>
Modules linked in:
---[ end trace 395fea1102bf1e82 ]---
RIP: 0010:ocfs2_populate_inode+0x183d/0x1860 fs/ocfs2/inode.c:336
Code: 00 00 e8 56 ad 58 fe 45 84 f6 75 2c e8 ec aa 58 fe 49 bc 00 00 00 00 00 fc ff df 48 8b 5c 24 28 e9 c7 f1 ff ff e8 d3 aa 58 fe <0f> 0b e8 cc aa 58 fe 0f 0b e9 de fe ff ff e8 c0 aa 58 fe e8 b3 05
RSP: 0018:ffffc900031eee00 EFLAGS: 00010293
RAX: ffffffff8320776d RBX: ffff88805d623338 RCX: ffff888027fcbb80
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000000
RBP: ffffc900031eef50 R08: ffffffff8d89dc2f R09: 1ffffffff1b13b85
R10: dffffc0000000000 R11: fffffbfff1b13b86 R12: dffffc0000000000
R13: ffff88806ad35a2c R14: 0000000000000020 R15: 0000000000000001
FS:  000055558013f500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f434db2a1a9 CR3: 000000005dfb2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/22 00:38 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan kernel BUG in ocfs2_populate_inode
2025/03/04 22:06 linux-5.15.y c16c81c81336 c3901742 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_populate_inode
2025/03/04 21:36 linux-5.15.y c16c81c81336 c3901742 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_populate_inode
2026/02/21 23:39 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan kernel BUG in ocfs2_populate_inode
2025/03/04 21:05 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in ocfs2_populate_inode
* Struck through repros no longer work on HEAD.